As many as 800 activists gathered outside Tesla's factory near Berlin Friday to protest its expansion plans, and some of them clashed with police as they attempted to break into the plant.

"There are currently 800 activists on the Tesla Gigafactory site as part of the Disrupt Tesla Action Days," Disrupt, a coalition of self-declared anti-capitalist groups that organized the protest, said in a statement on its website.

Disrupt argues that Tesla CEO Elon Musk's plans to more than double the production capacity of Tesla's only factory in Europe would damage the local environment.

The group says the expansion would require clearing swathes of the surrounding forest and would further strain local water supply. It has planned four days of protests, which started Wednesday.

Neither Tesla nor police in Brandenburg, where the plant is located, have responded to CNN's request for comment. In a post on X, Musk wrote: "Protesters did not manage to break through the fenceline. There are still 2 intact fence lines all around."

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